/*
 * Copyright (c) 2014 Universita' di Firenze
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Tommaso Pecorella <tommaso.pecorella@unifi.it>
 */

#include "ns3/boolean.h"
#include "ns3/enum.h"
#include "ns3/icmpv6-l4-protocol.h"
#include "ns3/inet6-socket-address.h"
#include "ns3/internet-stack-helper.h"
#include "ns3/ipv6-address-helper.h"
#include "ns3/ipv6-l3-protocol.h"
#include "ns3/log.h"
#include "ns3/node-container.h"
#include "ns3/node.h"
#include "ns3/ripng-helper.h"
#include "ns3/ripng.h"
#include "ns3/simple-channel.h"
#include "ns3/simple-net-device.h"
#include "ns3/simulator.h"
#include "ns3/socket-factory.h"
#include "ns3/socket.h"
#include "ns3/test.h"
#include "ns3/udp-l4-protocol.h"
#include "ns3/udp-socket-factory.h"

#include <limits>
#include <string>

using namespace ns3;

/**
 * \ingroup internet-test
 *
 * \brief IPv6 RIPng Test
 */
class Ipv6RipngTest : public TestCase
{
    Ptr<Packet> m_receivedPacket; //!< Received packet

    /**
     * \brief Send data.
     * \param socket The sending socket.
     * \param to Destination address.
     */
    void DoSendData(Ptr<Socket> socket, std::string to);
    /**
     * \brief Send data.
     * \param socket The sending socket.
     * \param to Destination address.
     */
    void SendData(Ptr<Socket> socket, std::string to);

  public:
    void DoRun() override;
    Ipv6RipngTest();

    /**
     * \brief Receive data.
     * \param socket The receiving socket.
     */
    void ReceivePkt(Ptr<Socket> socket);
};

Ipv6RipngTest::Ipv6RipngTest()
    : TestCase("RIPng")
{
}

void
Ipv6RipngTest::ReceivePkt(Ptr<Socket> socket)
{
    uint32_t availableData [[maybe_unused]] = socket->GetRxAvailable();
    m_receivedPacket = socket->Recv(std::numeric_limits<uint32_t>::max(), 0);
    NS_TEST_ASSERT_MSG_EQ(availableData,
                          m_receivedPacket->GetSize(),
                          "Received packet size is not equal to Rx buffer size");
}

void
Ipv6RipngTest::DoSendData(Ptr<Socket> socket, std::string to)
{
    Address realTo = Inet6SocketAddress(Ipv6Address(to.c_str()), 1234);
    NS_TEST_EXPECT_MSG_EQ(socket->SendTo(Create<Packet>(123), 0, realTo), 123, "100");
}

void
Ipv6RipngTest::SendData(Ptr<Socket> socket, std::string to)
{
    m_receivedPacket = Create<Packet>();
    Simulator::ScheduleWithContext(socket->GetNode()->GetId(),
                                   Seconds(60),
                                   &Ipv6RipngTest::DoSendData,
                                   this,
                                   socket,
                                   to);
    Simulator::Stop(Seconds(66));
    Simulator::Run();
}

void
Ipv6RipngTest::DoRun()
{
    // Create topology

    Ptr<Node> txNode = CreateObject<Node>();
    Ptr<Node> rxNode = CreateObject<Node>();
    Ptr<Node> routerA = CreateObject<Node>();
    Ptr<Node> routerB = CreateObject<Node>();
    Ptr<Node> routerC = CreateObject<Node>();

    NodeContainer nodes(txNode, rxNode);
    NodeContainer routers(routerA, routerB, routerC);
    NodeContainer all(nodes, routers);

    RipNgHelper ripNgRouting;
    InternetStackHelper internetv6routers;
    internetv6routers.SetRoutingHelper(ripNgRouting);
    internetv6routers.Install(routers);

    InternetStackHelper internetv6nodes;
    internetv6nodes.Install(nodes);

    NetDeviceContainer net1;
    NetDeviceContainer net2;
    NetDeviceContainer net3;
    NetDeviceContainer net4;

    // Sender Node
    Ptr<SimpleNetDevice> txDev;
    {
        txDev = CreateObject<SimpleNetDevice>();
        txDev->SetAddress(Mac48Address("00:00:00:00:00:01"));
        txNode->AddDevice(txDev);
    }
    net1.Add(txDev);

    // Router A
    Ptr<SimpleNetDevice> fwDev1routerA;
    Ptr<SimpleNetDevice> fwDev2routerA;
    { // first interface
        fwDev1routerA = CreateObject<SimpleNetDevice>();
        fwDev1routerA->SetAddress(Mac48Address("00:00:00:00:00:02"));
        routerA->AddDevice(fwDev1routerA);
    }
    net1.Add(fwDev1routerA);

    { // second interface
        fwDev2routerA = CreateObject<SimpleNetDevice>();
        fwDev2routerA->SetAddress(Mac48Address("00:00:00:00:00:03"));
        routerA->AddDevice(fwDev2routerA);
    }
    net2.Add(fwDev2routerA);

    // Router B
    Ptr<SimpleNetDevice> fwDev1routerB;
    Ptr<SimpleNetDevice> fwDev2routerB;
    { // first interface
        fwDev1routerB = CreateObject<SimpleNetDevice>();
        fwDev1routerB->SetAddress(Mac48Address("00:00:00:00:00:04"));
        routerB->AddDevice(fwDev1routerB);
    }
    net2.Add(fwDev1routerB);

    { // second interface
        fwDev2routerB = CreateObject<SimpleNetDevice>();
        fwDev2routerB->SetAddress(Mac48Address("00:00:00:00:00:05"));
        routerB->AddDevice(fwDev2routerB);
    }
    net3.Add(fwDev2routerB);

    // Router C
    Ptr<SimpleNetDevice> fwDev1routerC;
    Ptr<SimpleNetDevice> fwDev2routerC;
    { // first interface
        fwDev1routerC = CreateObject<SimpleNetDevice>();
        fwDev1routerC->SetAddress(Mac48Address("00:00:00:00:00:06"));
        routerC->AddDevice(fwDev1routerC);
    }
    net3.Add(fwDev1routerC);

    { // second interface
        fwDev2routerC = CreateObject<SimpleNetDevice>();
        fwDev2routerC->SetAddress(Mac48Address("00:00:00:00:00:07"));
        routerC->AddDevice(fwDev2routerC);
    }
    net4.Add(fwDev2routerC);

    // Rx node
    Ptr<SimpleNetDevice> rxDev;
    { // first interface
        rxDev = CreateObject<SimpleNetDevice>();
        rxDev->SetAddress(Mac48Address("00:00:00:00:00:08"));
        rxNode->AddDevice(rxDev);
    }
    net4.Add(rxDev);

    // link the channels
    Ptr<SimpleChannel> channel1 = CreateObject<SimpleChannel>();
    txDev->SetChannel(channel1);
    fwDev1routerA->SetChannel(channel1);

    Ptr<SimpleChannel> channel2 = CreateObject<SimpleChannel>();
    fwDev2routerA->SetChannel(channel2);
    fwDev1routerB->SetChannel(channel2);

    Ptr<SimpleChannel> channel3 = CreateObject<SimpleChannel>();
    fwDev2routerB->SetChannel(channel3);
    fwDev1routerC->SetChannel(channel3);

    Ptr<SimpleChannel> channel4 = CreateObject<SimpleChannel>();
    fwDev2routerC->SetChannel(channel4);
    rxDev->SetChannel(channel4);

    // Setup IPv6 addresses and forwarding
    Ipv6AddressHelper ipv6;

    ipv6.SetBase(Ipv6Address("2001:1::"), Ipv6Prefix(64));
    Ipv6InterfaceContainer iic1 = ipv6.AssignWithoutOnLink(net1);
    iic1.SetForwarding(1, true);
    iic1.SetDefaultRouteInAllNodes(1);

    Ipv6InterfaceContainer iic2 = ipv6.AssignWithoutAddress(net2);
    iic2.SetForwarding(0, true);
    iic2.SetForwarding(1, true);

    Ipv6InterfaceContainer iic3 = ipv6.AssignWithoutAddress(net3);
    iic3.SetForwarding(0, true);
    iic3.SetForwarding(1, true);

    ipv6.SetBase(Ipv6Address("2001:2::"), Ipv6Prefix(64));
    Ipv6InterfaceContainer iic4 = ipv6.AssignWithoutOnLink(net4);
    iic4.SetForwarding(0, true);
    iic4.SetDefaultRouteInAllNodes(0);

    // Create the UDP sockets
    Ptr<SocketFactory> rxSocketFactory = rxNode->GetObject<UdpSocketFactory>();
    Ptr<Socket> rxSocket = rxSocketFactory->CreateSocket();
    NS_TEST_EXPECT_MSG_EQ(
        rxSocket->Bind(Inet6SocketAddress(Ipv6Address("2001:2::200:ff:fe00:8"), 1234)),
        0,
        "trivial");
    rxSocket->SetRecvCallback(MakeCallback(&Ipv6RipngTest::ReceivePkt, this));

    Ptr<SocketFactory> txSocketFactory = txNode->GetObject<UdpSocketFactory>();
    Ptr<Socket> txSocket = txSocketFactory->CreateSocket();
    txSocket->SetAllowBroadcast(true);

    // ------ Now the tests ------------

    // Unicast test
    SendData(txSocket, "2001:2::200:ff:fe00:8");
    NS_TEST_EXPECT_MSG_EQ(m_receivedPacket->GetSize(), 123, "IPv6 RIPng should work.");

    m_receivedPacket->RemoveAllByteTags();

    Simulator::Destroy();
}

// Ipv6RipngCountToInfinityTest

/**
 * \ingroup internet-test
 *
 * \brief IPv6 RIPng count to infinity Test
 */
class Ipv6RipngCountToInfinityTest : public TestCase
{
    Ptr<Packet> m_receivedPacket; //!< Received packet

    /**
     * \brief Send data.
     * \param socket The sending socket.
     * \param to Destination address.
     */
    void DoSendData(Ptr<Socket> socket, std::string to);
    /**
     * \brief Send data.
     * \param socket The sending socket.
     * \param to Destination address.
     */
    void SendData(Ptr<Socket> socket, std::string to);

  public:
    void DoRun() override;
    Ipv6RipngCountToInfinityTest();

    /**
     * \brief Receive data.
     * \param socket The receiving socket.
     */
    void ReceivePkt(Ptr<Socket> socket);
};

Ipv6RipngCountToInfinityTest::Ipv6RipngCountToInfinityTest()
    : TestCase("RIPng counting to infinity")
{
}

void
Ipv6RipngCountToInfinityTest::ReceivePkt(Ptr<Socket> socket)
{
    uint32_t availableData [[maybe_unused]] = socket->GetRxAvailable();
    m_receivedPacket = socket->Recv(std::numeric_limits<uint32_t>::max(), 0);
    NS_TEST_ASSERT_MSG_EQ(availableData,
                          m_receivedPacket->GetSize(),
                          "Received packet size is not equal to Rx buffer size");
}

void
Ipv6RipngCountToInfinityTest::DoSendData(Ptr<Socket> socket, std::string to)
{
    Address realTo = Inet6SocketAddress(Ipv6Address(to.c_str()), 1234);
    NS_TEST_EXPECT_MSG_EQ(socket->SendTo(Create<Packet>(123), 0, realTo), 123, "100");
}

void
Ipv6RipngCountToInfinityTest::SendData(Ptr<Socket> socket, std::string to)
{
    m_receivedPacket = Create<Packet>();
    Simulator::ScheduleWithContext(socket->GetNode()->GetId(),
                                   Seconds(60),
                                   &Ipv6RipngCountToInfinityTest::DoSendData,
                                   this,
                                   socket,
                                   to);
    Simulator::Stop(Seconds(66));
    Simulator::Run();
}

void
Ipv6RipngCountToInfinityTest::DoRun()
{
    // Create topology

    Ptr<Node> txNode = CreateObject<Node>();
    Ptr<Node> rxNode = CreateObject<Node>();
    Ptr<Node> routerA = CreateObject<Node>();
    Ptr<Node> routerB = CreateObject<Node>();
    Ptr<Node> routerC = CreateObject<Node>();

    NodeContainer nodes(txNode, rxNode);
    NodeContainer routers(routerA, routerB, routerC);
    NodeContainer all(nodes, routers);

    RipNgHelper ripNgRouting;
    // Change the router's interface metric to 10, must not send packets (count to infinity)
    // note: Interface 0 is the loopback.
    ripNgRouting.SetInterfaceMetric(routerA, 2, 10);
    ripNgRouting.SetInterfaceMetric(routerB, 1, 10);
    ripNgRouting.SetInterfaceMetric(routerB, 2, 10);
    ripNgRouting.SetInterfaceMetric(routerC, 1, 10);

    InternetStackHelper internetv6routers;
    internetv6routers.SetRoutingHelper(ripNgRouting);
    internetv6routers.Install(routers);

    InternetStackHelper internetv6nodes;
    internetv6nodes.Install(nodes);

    NetDeviceContainer net1;
    NetDeviceContainer net2;
    NetDeviceContainer net3;
    NetDeviceContainer net4;

    // Sender Node
    Ptr<SimpleNetDevice> txDev;
    {
        txDev = CreateObject<SimpleNetDevice>();
        txDev->SetAddress(Mac48Address("00:00:00:00:00:01"));
        txNode->AddDevice(txDev);
    }
    net1.Add(txDev);

    // Router A
    Ptr<SimpleNetDevice> fwDev1routerA;
    Ptr<SimpleNetDevice> fwDev2routerA;
    { // first interface
        fwDev1routerA = CreateObject<SimpleNetDevice>();
        fwDev1routerA->SetAddress(Mac48Address("00:00:00:00:00:02"));
        routerA->AddDevice(fwDev1routerA);
    }
    net1.Add(fwDev1routerA);

    { // second interface
        fwDev2routerA = CreateObject<SimpleNetDevice>();
        fwDev2routerA->SetAddress(Mac48Address("00:00:00:00:00:03"));
        routerA->AddDevice(fwDev2routerA);
    }
    net2.Add(fwDev2routerA);

    // Router B
    Ptr<SimpleNetDevice> fwDev1routerB;
    Ptr<SimpleNetDevice> fwDev2routerB;
    { // first interface
        fwDev1routerB = CreateObject<SimpleNetDevice>();
        fwDev1routerB->SetAddress(Mac48Address("00:00:00:00:00:04"));
        routerB->AddDevice(fwDev1routerB);
    }
    net2.Add(fwDev1routerB);

    { // second interface
        fwDev2routerB = CreateObject<SimpleNetDevice>();
        fwDev2routerB->SetAddress(Mac48Address("00:00:00:00:00:05"));
        routerB->AddDevice(fwDev2routerB);
    }
    net3.Add(fwDev2routerB);

    // Router C
    Ptr<SimpleNetDevice> fwDev1routerC;
    Ptr<SimpleNetDevice> fwDev2routerC;
    { // first interface
        fwDev1routerC = CreateObject<SimpleNetDevice>();
        fwDev1routerC->SetAddress(Mac48Address("00:00:00:00:00:06"));
        routerC->AddDevice(fwDev1routerC);
    }
    net3.Add(fwDev1routerC);

    { // second interface
        fwDev2routerC = CreateObject<SimpleNetDevice>();
        fwDev2routerC->SetAddress(Mac48Address("00:00:00:00:00:07"));
        routerC->AddDevice(fwDev2routerC);
    }
    net4.Add(fwDev2routerC);

    // Rx node
    Ptr<SimpleNetDevice> rxDev;
    { // first interface
        rxDev = CreateObject<SimpleNetDevice>();
        rxDev->SetAddress(Mac48Address("00:00:00:00:00:08"));
        rxNode->AddDevice(rxDev);
    }
    net4.Add(rxDev);

    // link the channels
    Ptr<SimpleChannel> channel1 = CreateObject<SimpleChannel>();
    txDev->SetChannel(channel1);
    fwDev1routerA->SetChannel(channel1);

    Ptr<SimpleChannel> channel2 = CreateObject<SimpleChannel>();
    fwDev2routerA->SetChannel(channel2);
    fwDev1routerB->SetChannel(channel2);

    Ptr<SimpleChannel> channel3 = CreateObject<SimpleChannel>();
    fwDev2routerB->SetChannel(channel3);
    fwDev1routerC->SetChannel(channel3);

    Ptr<SimpleChannel> channel4 = CreateObject<SimpleChannel>();
    fwDev2routerC->SetChannel(channel4);
    rxDev->SetChannel(channel4);

    // Setup IPv6 addresses and forwarding
    Ipv6AddressHelper ipv6;

    ipv6.SetBase(Ipv6Address("2001:1::"), Ipv6Prefix(64));
    Ipv6InterfaceContainer iic1 = ipv6.AssignWithoutOnLink(net1);
    iic1.SetForwarding(1, true);
    iic1.SetDefaultRouteInAllNodes(1);

    Ipv6InterfaceContainer iic2 = ipv6.AssignWithoutAddress(net2);
    iic2.SetForwarding(0, true);
    iic2.SetForwarding(1, true);

    Ipv6InterfaceContainer iic3 = ipv6.AssignWithoutAddress(net3);
    iic3.SetForwarding(0, true);
    iic3.SetForwarding(1, true);

    ipv6.SetBase(Ipv6Address("2001:2::"), Ipv6Prefix(64));
    Ipv6InterfaceContainer iic4 = ipv6.AssignWithoutOnLink(net4);
    iic4.SetForwarding(0, true);
    iic4.SetDefaultRouteInAllNodes(0);

    // Create the UDP sockets
    Ptr<SocketFactory> rxSocketFactory = rxNode->GetObject<UdpSocketFactory>();
    Ptr<Socket> rxSocket = rxSocketFactory->CreateSocket();
    NS_TEST_EXPECT_MSG_EQ(
        rxSocket->Bind(Inet6SocketAddress(Ipv6Address("2001:2::200:ff:fe00:8"), 1234)),
        0,
        "trivial");
    rxSocket->SetRecvCallback(MakeCallback(&Ipv6RipngCountToInfinityTest::ReceivePkt, this));

    Ptr<SocketFactory> txSocketFactory = txNode->GetObject<UdpSocketFactory>();
    Ptr<Socket> txSocket = txSocketFactory->CreateSocket();
    txSocket->SetAllowBroadcast(true);

    // ------ Now the tests ------------

    SendData(txSocket, "2001:2::200:ff:fe00:8");
    NS_TEST_EXPECT_MSG_EQ(m_receivedPacket->GetSize(), 0, "RIPng counting to infinity.");

    Simulator::Destroy();
}

/**
 * \ingroup internet-test
 *
 * \brief IPv6 RIPng SplitHorizon strategy Test
 */
class Ipv6RipngSplitHorizonStrategyTest : public TestCase
{
    RipNg::SplitHorizonType_e m_setStrategy;      //!< Strategy set.
    RipNg::SplitHorizonType_e m_detectedStrategy; //!< Strategy detected.

  public:
    void DoRun() override;
    /**
     * \brief Constructor.
     * \param strategy The SplitHorizon strategy.
     */
    Ipv6RipngSplitHorizonStrategyTest(RipNg::SplitHorizonType_e strategy);

    /**
     * \brief Receive data.
     * \param socket The receiving socket.
     */
    void ReceivePktProbe(Ptr<Socket> socket);
};

Ipv6RipngSplitHorizonStrategyTest::Ipv6RipngSplitHorizonStrategyTest(
    RipNg::SplitHorizonType_e strategy)
    : TestCase("RIPng Split Horizon strategy")
{
    m_setStrategy = strategy;
}

void
Ipv6RipngSplitHorizonStrategyTest::ReceivePktProbe(Ptr<Socket> socket)
{
    uint32_t availableData [[maybe_unused]] = socket->GetRxAvailable();
    Address srcAddr;
    Ptr<Packet> receivedPacketProbe =
        socket->RecvFrom(std::numeric_limits<uint32_t>::max(), 0, srcAddr);
    NS_TEST_ASSERT_MSG_EQ(availableData,
                          receivedPacketProbe->GetSize(),
                          "ReceivedPacketProbe size is not equal to the Rx buffer size");
    Ipv6Address senderAddress = Inet6SocketAddress::ConvertFrom(srcAddr).GetIpv6();

    if (senderAddress == "fe80::200:ff:fe00:4")
    {
        RipNgHeader hdr;
        receivedPacketProbe->RemoveHeader(hdr);
        std::list<RipNgRte> rtes = hdr.GetRteList();

        // validate the RTEs before processing
        for (auto iter = rtes.begin(); iter != rtes.end(); iter++)
        {
            if (iter->GetPrefix() == "2001:1::")
            {
                bool correct = false;
                if (iter->GetRouteMetric() == 16)
                {
                    correct = true;
                    m_detectedStrategy = RipNg::POISON_REVERSE;
                }
                else if (iter->GetRouteMetric() == 2)
                {
                    correct = true;
                    m_detectedStrategy = RipNg::NO_SPLIT_HORIZON;
                }
                NS_TEST_EXPECT_MSG_EQ(correct,
                                      true,
                                      "RIPng: unexpected metric value: " << iter->GetRouteMetric());
            }
        }
    }
}

void
Ipv6RipngSplitHorizonStrategyTest::DoRun()
{
    // Create topology

    Ptr<Node> fakeNode = CreateObject<Node>();
    Ptr<Node> listener = CreateObject<Node>();

    Ptr<Node> routerA = CreateObject<Node>();
    Ptr<Node> routerB = CreateObject<Node>();

    NodeContainer listeners(listener, fakeNode);
    NodeContainer routers(routerA, routerB);
    NodeContainer all(routers, listeners);

    RipNgHelper ripNgRouting;
    ripNgRouting.Set("SplitHorizon", EnumValue(m_setStrategy));

    InternetStackHelper internetv6routers;
    internetv6routers.SetRoutingHelper(ripNgRouting);
    internetv6routers.Install(routers);

    InternetStackHelper internetv6nodes;
    internetv6nodes.Install(listeners);

    NetDeviceContainer net0;
    NetDeviceContainer net1;

    // Fake Node
    Ptr<SimpleNetDevice> silentDev;
    {
        silentDev = CreateObject<SimpleNetDevice>();
        silentDev->SetAddress(Mac48Address("00:00:00:00:00:01"));
        fakeNode->AddDevice(silentDev);
    }
    net0.Add(silentDev);

    // Router A
    Ptr<SimpleNetDevice> silentDevRouterA;
    Ptr<SimpleNetDevice> fwDevRouterA;
    { // silent interface
        silentDevRouterA = CreateObject<SimpleNetDevice>();
        silentDevRouterA->SetAddress(Mac48Address("00:00:00:00:00:02"));
        routerA->AddDevice(silentDevRouterA);
    }
    net0.Add(silentDevRouterA);

    { // first interface
        fwDevRouterA = CreateObject<SimpleNetDevice>();
        fwDevRouterA->SetAddress(Mac48Address("00:00:00:00:00:03"));
        routerA->AddDevice(fwDevRouterA);
    }
    net1.Add(fwDevRouterA);

    // Router B
    Ptr<SimpleNetDevice> fwDevRouterB;
    { // first interface
        fwDevRouterB = CreateObject<SimpleNetDevice>();
        fwDevRouterB->SetAddress(Mac48Address("00:00:00:00:00:04"));
        routerB->AddDevice(fwDevRouterB);
    }
    net1.Add(fwDevRouterB);

    // listener A
    Ptr<SimpleNetDevice> listenerDev;
    {
        listenerDev = CreateObject<SimpleNetDevice>();
        listenerDev->SetAddress(Mac48Address("00:00:00:00:00:05"));
        listener->AddDevice(listenerDev);
    }
    net1.Add(listenerDev);

    // link the channels
    Ptr<SimpleChannel> channel0 = CreateObject<SimpleChannel>();
    silentDev->SetChannel(channel0);
    silentDevRouterA->SetChannel(channel0);

    Ptr<SimpleChannel> channel1 = CreateObject<SimpleChannel>();
    fwDevRouterA->SetChannel(channel1);
    fwDevRouterB->SetChannel(channel1);
    listenerDev->SetChannel(channel1);

    // Setup IPv6 addresses and forwarding
    Ipv6AddressHelper ipv6;

    ipv6.SetBase(Ipv6Address("2001:1::"), Ipv6Prefix(64));
    Ipv6InterfaceContainer iic0 = ipv6.AssignWithoutOnLink(net0);

    Ipv6InterfaceContainer iic1 = ipv6.AssignWithoutAddress(net1);
    iic1.SetForwarding(0, true);
    iic1.SetForwarding(1, true);

    // Create the UDP sockets
    Ptr<SocketFactory> rxSocketFactory = listener->GetObject<UdpSocketFactory>();
    Ptr<Socket> rxSocket = rxSocketFactory->CreateSocket();
    rxSocket->BindToNetDevice(listenerDev);
    NS_TEST_EXPECT_MSG_EQ(rxSocket->Bind(Inet6SocketAddress(Ipv6Address("ff02::9"), 521)),
                          0,
                          "trivial");
    rxSocket->SetRecvCallback(
        MakeCallback(&Ipv6RipngSplitHorizonStrategyTest::ReceivePktProbe, this));

    // ------ Now the tests ------------

    // If the strategy is Split Horizon, then no packet will be received.
    m_detectedStrategy = RipNg::SPLIT_HORIZON;

    Simulator::Stop(Seconds(66));
    Simulator::Run();
    NS_TEST_EXPECT_MSG_EQ(m_detectedStrategy, m_setStrategy, "RIPng counting to infinity.");

    Simulator::Destroy();
}

/**
 * \ingroup internet-test
 *
 * \brief IPv6 RIPng TestSuite
 */
class Ipv6RipngTestSuite : public TestSuite
{
  public:
    Ipv6RipngTestSuite()
        : TestSuite("ipv6-ripng", Type::UNIT)
    {
        AddTestCase(new Ipv6RipngTest, TestCase::Duration::QUICK);
        AddTestCase(new Ipv6RipngCountToInfinityTest, TestCase::Duration::QUICK);
        AddTestCase(new Ipv6RipngSplitHorizonStrategyTest(RipNg::POISON_REVERSE),
                    TestCase::Duration::QUICK);
        AddTestCase(new Ipv6RipngSplitHorizonStrategyTest(RipNg::SPLIT_HORIZON),
                    TestCase::Duration::QUICK);
        AddTestCase(new Ipv6RipngSplitHorizonStrategyTest(RipNg::NO_SPLIT_HORIZON),
                    TestCase::Duration::QUICK);
    }
};

static Ipv6RipngTestSuite g_ipv6ripngTestSuite; //!< Static variable for test initialization
